Shingle cutter



April 20, 1937. s. N. GUNDLACH 2,077,474

SHINGLE CUTTER Filed April l, 1956 Patented Apr. 20, 1937 UNITED STATESPATENT OFFICE 6 Claims.

This invention relates to cutting devices, particularly portable shinglecutters of the kind shown in my Patent No. 1,814,151 dated July 14,1931. The objects of the present invention are to provide a powerfuldevice operable by the operating lever of the cutter for quickly andeasily punching nail holes in the shingles and to provide for simplicityand cheapness of construction, compactness of design and the easyattachlo ment of said device to said cutter. The invention consists inthe shingle cutter and in the construction, combinations andarrangements of parts hereinafter described and claimed.

in the accompanying drawing, which forms l5 part of this specificationand wherein like symbols refer to like parts wherever they occur.

Fig. l is a side view of a shingle cutter embodying my invention,

Fig. 2 is a view of the other side of the shingle punching end of thecutter,

Fig. 3 is a fragmentary view similar to Fig. l, showing the position ofthe parts during the operation of punching a shingle,

Fig. 4 is a fragmentary front end elevation of the cutter in the regionof the punching device,

Fig. 5 is an enlarged fragmentary side elevation of the shingle cutterin the region of the punching device, the punch holder being shownpartly in section,

Fig. 6 is a view similar to Fig. 5, showing the punch in engagement witha shingle, and

Fig. 7 is a section on the line I-l in Fig. 6.

The shingle cutter shown in the accompanying drawing comprises astationary lower holder I DlOvided near its ends with suitablesupporting legs 2 and along its top with a suitable knife blade 3, andan upper holder 4 pivotally supported, as at 5, at one end of said lowerholder and provided along its bottom with a knife blade 3 adapted tocooperate with the lower knife blade. The pivoted upper knife holder 4is raised and lowered by means of a bent lever 'I having a short arm 8pivotally connected by means of a horizontal pin 9 to the free end ofsaid upper knife holder, a free long arm I0 constituting an operatinghandle, and a second short arm II pivotally connected by means of ahorizontal pin I2 to the upper end of an upright link I3, Whose lowerend is secured by means of a horizontal pin I4 to the adjacent end ofthe stationary lower knife holder I. By this arrangement, when theoperating handle I0 of the lever 1 is swung downwardly, said leverpivots on the pin I2 at the upper end of the link I3 and thus swings thepivoted upper knife carrier 4 downwardly into cutting position and, atthe same time, causes said link to swing on the supporting pin I4therefor toward the free end of said upper knife carrier.

Theabove shingle cutter is provided with a device for punching nailholes in the shingles. Said punching device comprises a punch holder orsupporting bracket I5 mounted on the cutter opposite the free end of thepivoted knife holder 4 with its rear upper corner supported on the 10pivot pin I2 and with its rear lower corner supported on the pivot pinI4. The punch supporting bracket I5 is provided adjacent to its frontend with an upwardly opening notch I6 that extends from side to side ofsaid bracket. Mount- 1 ed in a pocket or recess Il provided therefor inthe side face of the bracket I5 rearwardly of the notch I6 therein is aplunger or punch I8 adapted for axially sliding movement across saidnotch through a hole I9 leading thereto from the front end of saidrecess. The punch extends rearwardly from the pocket I1 through a hole20 at the rear end thereof with its rear end disposed opposite a lug 2|on the free end of the pivoted knife holder 4. The punch is normallyheld substantially clear of the notch I6 by a coil spring 22 that issleeved on said punch with on end abutting against the forward end wallof the pocket and with its rear end abutting against a washer 23, whichis sleeved on the punch and is held against rearward movement thereon bymeans of a Cotter pin 24, whose closed end works in an elongated slot 25provided therefor in the side of the recess and serves to limit therearward travel of the punch. The punch is provided with a taperedforward end portion Ia adapted to cooperate with a suitable die 26mounted in an opening 21 provided therefor in the front wall of theshingle receiving notch I6. The opening 2l extends through the forwardend of the punch holder I5 so as to permit the punching to be ejectedfrom said opening at the forward end thereof.

By the arrangement described, when the operating arm of the knifeoperating lever is swung downwardly, the punch support I5 swings rear'-wardly with the link I3 about! the axis of the pin I4 towards the frontend of the pivoted knife carrier 4 until the rear end of the punch I8 isbrought into abutting relation with the lug 2I 50 on the front end ofsaid knife carrier. Further rearward swinging movement of the punchsupport forces the punch axially against the pressure of the spring 22across the notch I6 in said holder to cause its front end portion toenter 55 the die 26 in the front wall of said notch, thereby punching ahole in a shingle that has been positioned in said notch. The notchserves to support the weight of the shingle during the opera- 5 tion ofpunching the hole therein and it also locates said hole the requireddistance from the lower edge of the shingle. The punching device isstrong and durable and is easily operated by the long handled knifeoperating lever of the l shingle cutter.

Obviously, the hereinbefore described construction admits ofconsiderable modification without departing from the invention.Therefore, I do not wish to be limited to the precise construction lshown and described.

What I claim is:

1. A shingle cutter comprising a stationary knife holder, a pivotedknife holder, meansforV actuating said pivoted knife holder including amember movable relative to said holders, and an axially slidable punchmovable with said member into engagement with one of said holders to bemoved into operative position thereby.

2. A shingle cutter comprising a stationary knife' holder, a pivotedknife holder, means for actuating said pivoted knife holder including amember movable relative to said holders, an axially slidable punchmovable with said member into engagement with the free end of saidpivoted knife holder to be moved into operative position thereby, and aspring for returning said punch to inoperative position when the latteris disengaged from said pivoted knife holder.

3. A shingle cutter comprising a stationary knife holder, a pivotedknife holder, means for actuating said pivoted knife holder including amember movable relative to said holders, an axially slidable punchmovable with said member into engagement with the free end of saidpivoted knife holder to be moved into operative position thereby, and aspring for returning said punch to inoperative position when the latteris disengaged from said pivoted knife holder, said member being providedopposite the work en- '15 gagingend of said punch with an upwardlyopening notch adapted to receive and support the shingle during thepunching operation.

4 AA shingle cutter comprising a stationary lower knife holder, apivoted upper knife holder, a link disposed opposite the free end ofsaid upper knife holder with its lower end pivoted to the correspondingend of said lower knife holder, a lever having an arm pivoted to thefree end of said upper knife holder and an arm pivoted to the upper endof said link, whereby said link is adapted to swing towards said ends ofsaid holders when said lever is actuated to move said pivoted holderinto operative position, a punch holder pivotally secured to said lower`knife holder at its point of connection with the lower end of said linkand to said lever at its point of connection with the upper end of saidlink, and a punch axially slidable in said holder with one end inposition to be forced against the free end of said pivoted holder whensaid lever is actuated to move said pivoted holder to operativeposition.

5. A shingle cutter comprising a stationary lower knife holder, apivoted upper knife holder, a lever for operating said upper knifeholder, a punch holder pivotally secured to said lower knife holderopposite the free end of said pivoted knife holder and to said lever formovement thereby towards and away from said end of said pivoted knifeholder, and a punch axially slidable in said holder in position to beforced against the free end of said p-ivoted knife holder and moved intooperative position thereby, when said lever is actuated to move saidpivoted knife holder to operative position.

6. A shingle cutter comprising a stationary lower knife holder, apivoted upper knife holder, a lever for operating said upper knifeholder, a punch holder pivotally secured to said lower knife holderopposite the free end of said pivoted knife holder and to said lever formovement thereby towards and away from said end of said pivoted knifeholder, a punch axially slidable in said holder in position to be forcedagainst the free end of said pivoted knife holder and moved intooperative position thereby, when said lever is actuated to move said.pivoted knife holder to operative position, and a spring mounted in saidpunch holder and cooperating with said punch to return the same toinoperative position when the pivoted knife holder is moved toinoperative position, said punch holder being provided opposite the workengaging end of said punch with an upwardly opening notch adapted toreceive and support the shingle during the punching operation.

SEVERIN N. GUNDLACH.

